225717557237 has 2 divisors, whose sum is σ = 225717557238. Its totient is φ = 225717557236.

The previous prime is 225717557173. The next prime is 225717557257. The reversal of 225717557237 is 732755717522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164328079876 + 61389477361 = 405374^2 + 247769^2 .

It is a cyclic number.

It is not a de Polignac number, because 225717557237 - 2⁶ = 225717557173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225717557257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112858778618 + 112858778619.

It is an arithmetic number, because the mean of its divisors is an integer number (112858778619).

Almost surely, 2^225717557237 is an apocalyptic number.

It is an amenable number.

225717557237 is a deficient number, since it is larger than the sum of its proper divisors (1).

225717557237 is an equidigital number, since it uses as much as digits as its factorization.

225717557237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7203000, while the sum is 53.

The spelling of 225717557237 in words is "two hundred twenty-five billion, seven hundred seventeen million, five hundred fifty-seven thousand, two hundred thirty-seven".